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<html lang="en">
<head>
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery电梯导航案列</title>
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    <script src="../jquery/jquery.v3.7.1.js"></script>
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</head>
<body>
    <div class="wrap">
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                <ul>
                    <li>手机通讯</li>
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        <div class="content-wrap">
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